where \(\varepsilon =0\)  in case \((a)\) , and \(\varepsilon >0\)  in case \((b).\) 
It is known [1]} that in case \((b)\)  integral (REF ) satisfies the following property: there exists a function \(\omega (\varepsilon )\)  such that \(\omega (\varepsilon )\rightarrow 0\)  as \(\varepsilon \rightarrow 0,\)  and
\(\varepsilon \Vert L(t,\varepsilon )\Vert \le \omega (\varepsilon )\) 
